diff --git a/docker/demo/Dockerfile b/docker/demo/Dockerfile
index ff5d69c5..7ff44b19 100644
--- a/docker/demo/Dockerfile
+++ b/docker/demo/Dockerfile
@@ -1,11 +1,12 @@
 FROM alpine/git
 
+ARG GIT_TAG
 ARG SEBSERVER_VERSION
 
 WORKDIR /demo
-RUN if [ "x${SEBSERVER_VERSION}" = "x" ] ; \
+RUN if [ "x${GIT_TAG}" = "x" ] ; \
     then git clone --depth 1 https://github.com/SafeExamBrowser/seb-server.git ; \
-    else git clone -b "v$SEBSERVER_VERSION" --depth 1 https://github.com/SafeExamBrowser/seb-server.git ; fi
+    else git clone -b "v$GIT_TAG" --depth 1 https://github.com/SafeExamBrowser/seb-server.git ; fi
 
 FROM maven:3.5-jdk-8-alpine
 
diff --git a/pom.xml b/pom.xml
index f20964a4..f873ad42 100644
--- a/pom.xml
+++ b/pom.xml
@@ -18,7 +18,7 @@
   <packaging>jar</packaging>
 
   <properties>
-    <sebserver-version>0.4.1</sebserver-version>
+    <sebserver-version>0.4.1-beta</sebserver-version>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
   </properties>